Download - ASKAP commissioning - ATNF
ACES | David McConnell |
BETA•Ceased operation from 16 Feb 2016•Huge benefits: learning how to use PAFs•BETA data continues to be used for ASKAPsoft testing•BETA performance is summarised in a paper recently submitted to PASA•Science papers from BETA:
•ASKAP H i imaging of the galaxy group IC 1459, Serra et al., MNRAS, 452, 2690, 2015•Discovery of H I gas in a young radio galaxy at z = 0.44 using the ASKAP, Allison et al. MNRAS, 453, 1249, 2015•A pilot ASKAP survey of radio transient events in the region around the intermittent pulsar PSR J1107–5907. Hobbs et al., MNRAS, 456, 3948, 2016•Wide-field broad-band radio imaging with phased array feeds: a pilot multi-epoch continuum survey with ASKAP-BETA, Heywood et al., MNRAS, 457, 4160, 2016•High-velocity OH megamasers in IRAS 20100–4156: Evidence for a Supermassive Black Hole, Harvey-Smith et al., MNRAS, 2016•Localization and broadband follow-up of the gravitational-wave transient GW150914, Abbott et al. arXiv 1602.08492, submitted to ApJ•Illuminating the last 8 billion years of cold gas towards two gravitationally lensed radio quasars, Allison et al., in prep.
Follow-up for GW150914 Frequency: 711 - 1015 MHz Surveyed area: 270 square deg Observing time: 18h Sensitivity: 1-5 mJy/beam
ACES | David McConnell |
ASKAPState
•12 antennas fitted with PAFs : 2, 4, 5, 10, 12, 13, 14, 16, 24, 27, 28, 30•Fringes acquired with all antennas (but not simultaneously)•Simultaneous fringes on 11 antennas•At present restricted to 48MHz band - 1 correlator block•Data ingest to the Pawsey Supercomputing Centre successfully demonstrated
ACES | David McConnell |
ASKAPState
•12 antennas fitted with PAFs : 2, 4, 5, 10, 12, 13, 14, 16, 24, 27, 28, 30•Fringes acquired with all antennas (but not simultaneously)•Simultaneous fringes on 11 antennas•At present restricted to 48MHz band - 1 correlator block•Data ingest to the Pawsey Supercomputing Centre successfully demonstrated
ASKAPsoft•Considerable progress over recent months•Substantial increase in resources allocated to the project•“Readiness” review held in March
•panel chaired by Jeff Kern of NRAO•recommended improving access to package for external users, may include additional
installations at institutions with the capabilities• Wide range of advances in the package: both in applications and in the pipeline
scripts
ACES | David McConnell |
ASKAP
Beam forming•36 beams formed•Use Sun as target for maxSNR beam weight determination•Observations take ~2 hours
ACES | David McConnell |
ASKAP
Beam forming•36 beams formed•Use Sun as target for maxSNR beam weight determination•Observations take ~2 hours
Imaging•Apus field 16:08:50, -78:12:00 - single pointing•9 Antennas, 36 beams•48 MHz BW centred at 939.5 MHz, 11 hours.•No interleaving. •1934-638 was observed for calibration: ~9 hours! (15 minutes per beam)•Theoretical image noise: expected ~150-200 μJy/beam; actual ~ 300μJy/beam
ACES | David McConnell |
ASKAP
Beam forming•36 beams formed•Use Sun as target for maxSNR beam weight determination•Observations take ~2 hours
Imaging•Apus field 16:08:50, -78:12:00 - single pointing•9 Antennas, 36 beams•48 MHz BW centred at 939.5 MHz, 11 hours.•No interleaving. •1934-638 was observed for calibration: ~9 hours! (15 minutes per beam)•Theoretical image noise: expected ~150-200 μJy/beam; actual ~ 300μJy/beam
Frequency tuning•technically different from BETA•recent progress: successful selection of different centre frequency: 1420 MHz.
ACES | David McConnell |
ASKAP work flowCommissioning Pre-Early Science Early Science Survey
ScienceGuest
ScienceData level
Proposal Internal Opportunistically ~Done Done to TAC
Specify observation ACES SST/ACES SST/ACES SST PI
Prepare observation ACES/SO ACES/SO SO/ACES SO SO
Schedule telescope SchedCom SchedCom SchedCom HSO HSO
Instrumental setup, calibration ACES/SO ACES/SO SO SO SO
Observation: launch, monitor ACES/SO ACES/SO SO SO SO
Process data ACES/SDP/SO SST/SDP/ACES SO,SDP <—> SST SO SO+ 5
Data validation SST SST PI 6
Process pipeline products SST SST PI 7
Store/release data products Comm. Archive CASDA/? CASDA CASDA CASDA
SO Science Operations HSO Head SO